and 81 cabins all communicate by magneto-type crank phones. One ring is for the pack station, two rings is for the camp and three rings means "all cabins pick up." There are also eight emergency telephone stations located along the hiking trail. The system is a single wire using the ground as a return path. Maintenance of the line was assumed by the association of cabin owners in 2018. In modern use, the term party line has occasionally been used to market conference calling and voice bulletin board services. See also Distinctive ring Conference call Group call Chat line References External links Atlanta telephone history Party Line intercept messages Local loop